<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/Tom-Jerry.jpg" alt="" />
      </div>
      <!-- 登陆表单区域 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名称 -->
        <!-- 校验规则prop -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-users"
          ></el-input>
        </el-form-item>
        <!-- 用户密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登陆</el-button>
          <el-button type="info" @click="resetloginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 登陆表单的数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456",
      },
      // 表单的验证规则对象
      loginFormRules: {
        // 验证用户名称是否合法
        username: [
          { required: true, message: "请输登陆名称", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        // 验证用户密码是否合法
        password: [
          { required: true, message: "请输登陆密码", trigger: "blur" },
          {
            min: 6,
            max: 15,
            message: "长度在 6 到 15 个字符",
            trigger: "blur",
          },
        ],
      },
    };
  },
  methods: {
    // 点击重置按钮，重置登陆表单
    resetloginForm() {
      console.log(this);
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        //console.log(valid);预校验
        if (!valid) return;
        const {data: res} = await this.$http.post("login", this.loginForm)
        if (res.meta.status !== 200) return this.$message.error("登陆失败")
        this.$message.success("登陆成功")
        // 1.将登录成功之后的 token 保存到客户端的 sessionStorage 中
        // 1.1 项目中除了登陆之外的其他api接口必须再登陆之后才能访问
        // 1.2 token 只应在当前网站打开期间生效， 所以将 token 保存到 sessionStorage 中 
        //console.log(res)
        window.sessionStorage.setItem("token", res.data.token)
        // 2. 通过编程式导航转到后台主页，路由地址是 /home
        this.$router.push("/home")
      });
    },
  },
};
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 6px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 30px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
